Types of angles

Front

WHAT IS AN ACUTE ANGLE?

Back

An angle that is less than 90 degrees.

Front

WHAT IS AN OBTUSE ANGLE?

Back

An angle that is greater than 90 degrees but less than 180 degrees.

Front

WHAT IS A RIGHT ANGLE?

Back

An angle that is exactly 90 degrees.

Front

WHAT ARE PERPENDICULAR LINES?

Back

Lines that intersect at right angles.

Front

WHAT ARE ALTERNATE INTERIOR ANGLES?

Back

Angles that lie on opposite sides of the transversal and inside the other lines.

Front

WHAT IS A STRAIGHT ANGLE?

Back

An angle that is exactly 180 degrees.

Front

WHAT IS A FULL TURN?

Back

An angle that is exactly 360 degrees.

Front

WHAT IS A COMPLEMENTARY ANGLE?

Back

Two angles that add up to 90 degrees.

Front

WHAT IS A SUPPLEMENTARY ANGLE?

Back

Two angles that add up to 180 degrees.

Front

WHAT IS A VERTICALLY OPPOSITE ANGLE?

Back

Angles that are opposite each other when two lines intersect.